This Vanilla Pudding Cake is a warm, comforting dessert with a light, golden cake layer on top and a rich, creamy vanilla pudding underneath. It's an old-fashioned cake that will be crowd-favorite.
Preheat the oven to 325°F. Lightly grease an 8 x 8-inch baking dish or 1 1/2-quart casserole dish.
Add the softened butter and granulated sugar to a large mixing bowl. Beat with an electric mixer until light and fluffy.
Add the egg yolks and vanilla extract to the butter mixture. Beat until smooth and well combined.
Slowly stir in 1 cup of slightly warmed whole milk until combined.
Add the all-purpose flour, salt, and cornstarch. Mix until fully combined. The batter will be thin at this stage.
In a clean mixing bowl, beat the egg whites with an electric mixer until soft peaks form.
Gently fold the beaten egg whites into the batter with a rubber spatula. Fold just until mostly incorporated. A few visible streaks of egg white are fine.
Pour the batter evenly into the prepared baking dish.
Slowly pour 1 1/2 cups of hot whole milk over the top of the batter. Do not stir.
Bake for 45–50 minutes, or until the top is lightly golden. The center should still have a slight jiggle underneath the cake layer. As the dessert bakes, the cake will rise to the top while a thick vanilla pudding layer forms underneath.
Remove the cake from the oven and let it rest for 15–20 minutes before serving warm. For a thicker, firmer pudding layer, refrigerate the cake before serving.
Dust with powdered sugar or serve with whipped cream and fresh berries, if desired.
Notes
Pour the hot milk slowly: Pour it gently and evenly over the surface so you don’t disturb the fluffy batter more than necessary.
Use the right size baking dish: An 8x8-inch dish or 1 1/2-quart casserole gives the cake enough depth for the cake and pudding layers to form properly.
Place the baking dish on a sheet pan: The batter and hot milk make the dish quite full, so a sheet pan makes it easier and safer to move in and out of the oven.
Check it near the end of baking: Oven temperatures vary, so start checking around 45 minutes. Look for a lightly golden top rather than waiting for the center to become completely firm.
Spoon servings instead of slicing: This dessert has a soft pudding layer underneath, so it’s easier to serve with a large spoon than to expect neat cake slices.